h1::after {
    content: '标题可以有多长';
}























/*p {
    color: green;
}

a {
    color: green;
}*/

p,
a {
    color: green;
}























/*div p {
    color: red;
}

div p a {
    color: red;
}*/

div p,
div p a {
    color: red;
}

.title {
    color: purple;
}

#demo {
    color: olive;
}

h2 {
    color: brown;
}

h2 {
    color: orange;
}

#length {
    /*font-size: 72pt;*/
    font-size: 72pt;
    color: #ccc;
    color: rgba(100, 100, 90, 0.8);
    font-family: arial;
    /*font-style: italic;*/
    font-weight: bolder;
}
